Cross-rail-securing device for machine-tools.



E. P. BULLARD, 11E.. GROSS 'RAIL SBGURING DEVICE FOR MACHINE TOOLS.

APPLICATION FILED JAN. 3, 1911.

1,058,720. Patented-Apr. 15, 1913 `a 1nnTs-gHmT 1.

@Y I I 1 y: 1 g g N lll i s LLWMGHMMMK E. P.BULLARD, JR. y GRSS RAILSEGURING DEVIGBVFOR MACHINE TOOLS.

APPLICA'JIOIII` FILED JAN. 3, 1911.:

l Patented Apr, 1 5., 1913.

2 SHEETS-SHEET 2.

IMX/N UNITED sTArEs PATENT. OFFICE.

EDWARD P. BULLARD, JR., l0F BRIDGEPORT, VICONNECTICUT," ASSIGNOBV'TO THEBUL- LARD MACHINE TOOL CO., OF BRIDGEIEORT, CONNECTICUT, A CORPORATIONOF CONNECTICUT.

CROSS-RAIL-SECURING DEICE FOR MACHINE-TOOLS.

Specification of'Letters Patent.

Patented Apr. 15, 1913.

' Application tiled January 3, 1911.` Serial No. 609,618.

'To all whom it may concern:

Be it known that I, EDWARD P. BULLARD,.

Jr.. citizen ofthe United States, and resident of Bridgeport', in thecounty of Fairfield -and State of Connecticut, Ahave in-.

vented certain new and usefull Improve.- ments in Cross-Rail-SecuringDevices for Machine-Tools, of which the following is a.

specification.

This invention relates to metal working machinery of the machinetooltype, and

particularly to improvements in that class of machinesknown as boringmills, maxian adjustable cross rail for sup-porting the il l) tool headabove the tables. Heretofore in this sort of machines ithas been commonto support. a pair of columns on the 4two opposite side portions of thelbase and to the rear ofthe center of the work carrying table, and

to provide a way in the vertically finished faces of these two columnsfor adjustably supporting the cross rail in position. These tivoIsimports adjoining the end portionsv of the rail. so far as l know.,have heretofore constituted the sole support for the rail. and as thehead carried bythe rail is usually positioned intermediate of thesepoints when in operation it does not stand perfectly rigid but willvibrate more or less according to lthe work being performed and theyieldability of the rail. I therefore find it particularly desirable, inthe present require--V ments of a machine of this class, where highgrade steel is to be operated' upon and where' rapid `production is anessential feature,

that both the head and its rail be rigidly po.

sit-ioned, which l have accomplished by providing an improved form ofcolumn made of4 a single piece, constituting the upper 'frame work ofthe machine and including two vertical faced ways for the attachment.

of the rail and by providing a third. con-I nection for the rail withthe intermediate portion of this column. and which like the sideconnections is made adjustableto permit the rail to be raised andlowered as desired.

On the accompanying drawings forming av part of this specificationsimilar characters of reference Will be found to designate like eralfigures and of which- 'Figure'L showsan incomplete side View of the mainparts of a boring mill and including my improved form of column crossrail and intermediate support therefor. Fig; 2, is a rear view* of theconstruction or corresponding parts throughout the sevthe machine shownin Figs. 1 and 2. Fig. 4l; is a plan view of Fig. ,3. Fig. 5. shows anenlarged detail cross sectional view of the in- 'termediate connectionof rail .and column heretofore referred 'to'. I

l Referring in detail to the 'characters of reference marked upon thedrawings 10 indicates the base of the machine and upon the forwardportion of which is operatively and which features ma)v obviouslvbe ofany preferred or well known tvpe and adapted to be fitted with an \vpreferred form of driving connections, notshown; Upon'the rear andraisedportion of thel base is mounted my improved form of column l2 andwhich as will be noted includes side portions 13 central portion lofthe-rail and extends into the concave face portion Aof the colmnm andupon -the central portion of this enlargement I. provide an extended'post 21 that projects rearward and against` the face of the web of thecolunmadjoining the slot 18 before mentioned. The threaded end of the Tbolt exi tends'through a portion of this post and is provided with a nutwhich may be gotten at through the side opening and beltightcned orloosened for the purpose of clamping' or releasing the post and railfrom the column as occasion requires. The column is furtherformed with acentral rear space Q4 intermediate of the side portions and havingvertically disposed faces 1'l lwith ment i2() is formed on the rear sideof the' shown in Fig. 1. Fig. 3, is a front view of mounted the rotarywork carrying table 11.

l web to receive motor or other driving medium for oper ting themachine. I also l torni pockets 25 in each of the side portions of thecolumn to receive Weights, not shown, which are used to counterbalance`the head :26, a nd which may be of any preferred con#- ,515 structio s.rI`his feature ofa single piece |column hen employed in connection witha rail having an intermediate third connection with the'colunnn'produces exceptionally stitf and rigid rail ywhen clamped inposition, thus insuring rigidity to the head an accuracy of operation ofits tools fupon the Work carried by the tablel Therefore, the invent-ionis considered to he highly important anld'essential for the productionof a first c'la'ss machine of this kind.

' Having 'thus described my invention what I claim and desire to secureby Letters Patent isi 1. In a mae ine tool of the: class described,

3 0 tlie combitialon with -a base, of a column mounted thereon andincluding integral side members lia-ving vertical ways andan integ'ralnon-movable Web portion with a vertical slot therein connecting thesides, a

3 5 clross rail adjustaibly mounted upon the Ways lof the side membersAand adjustably connected to the slot in the web of the column.

2. In a machine tool of the class described, the combinationv with a,base, of a' column A40 mouited vthereon andI formed of a single pieceand including side portions( and a nonmov'able Web-connecting the sameand hav ing a vertically disposed guide slot therein, /a railad-jiis'tably secured to the face of the 5 side portions-land having at-hir'd connection intermediate of said rail and slot of the'web whereby.the central portion of the rail is rigidly secured tothe said web.

. 3. In a machine tool of the class described,

Which obviously is not only cheaper to make,

the combination 'with' a bade, of a column mounted thereinandincluding-'side standards and a movable cross portion' with a verticalslot arranged in said cross portion, a vertically adjustable railsecured to the face of the side portilons and having an in termediat'erearwardly extended part to engage theslot. in the fixed cross portionof the column. and au adjust'able connection intermediate of the saidrearwardly extend ed part ot' the rail aud the slot of the cross portionot' the column which permits the rail to be securely clamped todilterent portions ot' the said cross portion.

l. In a machine' tool of the class described` the combinatioi with abase, of a column comprising side portions having vertically arrangedways on their faces and a concave cross portion h'aving a vertically andeen trally lirianged slot therein, a cross r'ail ad. justably secured tothe ways of the side por tions of the column and having au enlargementonits rear side intermediate ot the faces of the side columns, a boltcarried! iu an extension of the enlargement and adapted to engage theslot ot the cross portion and designed to be clamped in ditierentpositions with the vertical adjustment ot the Fall. i

lu a machine tool ot' the class described, the combination with a base.ot' a column mounted thereon and including .side standards and anou-movable intermediate criiss po-rtioii having a vertical slottherein. a vertically adjustable cross raillsecured to thc face ot' the'standards and to the .slot iu the intermediateA non-movable, crossportion. means for clamping said intermediate portion ot the crosstrailto the said slotted cross` portion, and a horizontally adjnstabletoolca'rr 'ing saddle mounted upon the said rail.

Signed at Bridgeport iu the cminty of Fairfield and Stateof Connecticutthis .)Si'h day, ot llecember A. 11,1910.

EDIVARD l". BULLARDJR.

IVitiiesses:

C. M. NEWMAN, G. M. MoREHoUsE.

